boston. boise? same flat rate. alabama. alaska? with priority mail flat rate boxes from the postal service. if it fits, it ships anywhere in the country for a low flat rate. dude's good. dude's real good. dudes. priority mail flat rate boxes. starting at just $5.15. only from the postal service. . >> for most of us a terror inducing word, sharks are already sending vacationers scattering as several cape cod beaches are forced to close after sightings close to shore. so, who would be crazy enough to voluntarily jump into shark-infested waters? that would be our nick watt, with an encore presentation. >> reporter: the beach i all about swimming, surfing, paddling, playing but we've all seen "jaws," we all remember that music. and at the back of every beachgoer's mind lurks the fear of the fin. somewhere out there, the great white. we've come to meet one of the most feared, demonized and endangered predators on earth. face to face. this is arguably the most shark-infested water on earth. >> how's the water, nick? >> reporter: now, we'